<template>
  <div>
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>添加商品</el-breadcrumb-item>
    </el-breadcrumb>
    <el-card>
      <el-alert title="添加商品信息" type="info" center show-icon :closable="false"></el-alert>

      <el-steps :space="200" :active="activeIndex-0" finish-status="success" align-center>
        <el-step title="基本信息"></el-step>
        <el-step title="商品参数"></el-step>
        <el-step title="商品属性"></el-step>
        <el-step title="商品图片"></el-step>
        <el-step title="商品内容"></el-step>
        <el-step title="完成"></el-step>
      </el-steps>
   

    <el-form
      :model="addForm"
      :rules="addRules"
      ref="ruleFormRef"
      label-width="100px"
      label-position="top"
    >
      <el-tabs :tab-position="'left'" v-model="activeIndex" :before-leave="beforeLeave" @tab-click="tabClick">
        <el-tab-pane label="基本信息" name="0">
          <el-form-item label="商品名称" prop="goods_name">
            <el-input v-model="addForm.goods_name"></el-input>
          </el-form-item>
           <el-form-item label="商品价格" prop="goods_price">
            <el-input type="number" v-model="addForm.goods_price"></el-input>
          </el-form-item>
           <el-form-item label="商品重量" prop="goods_weight">
            <el-input type="number" v-model="addForm.goods_weight"></el-input>
          </el-form-item>
           <el-form-item label="商品数量" prop="goods_number">
            <el-input type="number" v-model="addForm.goods_number"></el-input>
          </el-form-item>
          <el-form-item>
               <el-cascader
                v-model="addForm.goods_cat"
                :options="cateList"
                :props="cat_prop"
                @change="handleChange"></el-cascader>
          </el-form-item>
        </el-tab-pane>
        <el-tab-pane label="商品参数" name="1">
          <el-form-item :label="item.attr_name" v-for="(item, i) in tableManyList" :key="i">
            <el-checkbox-group border v-model="item.attr_vals">
                <el-checkbox :label="cb" v-for="(cb,k) in item.attr_vals" :key="k"></el-checkbox>
            </el-checkbox-group>
          </el-form-item>
        </el-tab-pane>
        <el-tab-pane label="商品属性" name="2">
            <el-form-item :label="item.attr_name" v-for="(item, i) in onlyList" :key="i">
                <el-input v-model="item.attr_vals"></el-input>
            </el-form-item>
        </el-tab-pane>
        <el-tab-pane label="商品图片" name="3">
            <el-upload
                class="upload-demo"
                action="http://127.0.0.1:8888/api/private/v1/upload"
                :on-preview="handlePreview"
                :on-remove="handleRemove"
                list-type="picture"
                :headers="token"
                :on-success="successHandle">
                <el-button size="small" type="primary">点击上传</el-button>
            </el-upload>
        </el-tab-pane>
        <el-tab-pane label="商品内容" name="4">
            <quill-editor v-model="goods_detail">

            </quill-editor>
            <el-button class="edit-btn" type="primary" @click="add">提交</el-button>
        </el-tab-pane>
      </el-tabs>
    </el-form>
    </el-card>
    <!-- 图片预览对话框 -->
    <el-dialog
        title="图片预览"
        :visible.sync="prewDialog"
        width="50%"
        >
        <img :src="this.preview_url" alt="">
    </el-dialog>
  </div>
</template>

<script>
import _ from 'lodash'
export default {
  data() {
    return {
      activeIndex: "0",
      // 添加商品表单对象
      // 商品分类列表
      cateList: [],
      addForm: {
        goods_name: "",
        goods_price: 0,
        goods_weight: 0,
        goods_number: 0,
        goods_cat: [],
        pics: [],
        attrs: []
      },
      // 图片预览路径
      preview_url: '',
      // 图片对话框的显示
      prewDialog: false,
      // 动态参数列表
      tableManyList: [],
      // 静态属性列表
      onlyList: [],
      // 商品级联props
      cat_prop: { expandTrigger: 'hover', label: 'cat_name', value: 'cat_id', children: 'children'},
      addRules: {
          goods_name: [
              {required: true, message: '请输入商品名称',trigger: 'blur'},
          ],
           goods_price: [
              {required: true, message: '请输入商品价格',trigger: 'blur'},
          ],
           goods_weight: [
              {required: true, message: '请输入商品重量',trigger: 'blur'},
          ],
           goods_number: [
              {required: true, message: '请输入商品数量',trigger: 'blur'},
          ]
      },
      token:{
          Authorization: window.sessionStorage.getItem('token')
      },
      // 商品详情
      goods_detail: '' 
    }
  },
  created() {
      this.getCateList()
  },
  methods: {
     async getCateList() {
         const {data: res} = await this.$http.get('categories')
         if (res.meta.status !== 200) return this.$message.error('获取列表失败')
         this.cateList = res.data

      },
    // 监听级联变化
    handleChange(){
      if (this.addForm.goods_cat.length !== 3)this.addForm.goods_cat = []
    },
     // 判断是否在离开前符合要求
     beforeLeave(newVal, oldVal ) {
         if(this.addForm.goods_cat.length!==3&&oldVal==='0')
         {
             this.$message.error('请先选择分类')
             return false
         }
     },
     // 点击下标为1的时候触发
     async tabClick() {
         if(this.activeIndex === '1'){
             const {data: res} = await this.$http.get(`categories/${this.CreatId}/attributes/`, {params:{sel: 'many'}})
             if (res.meta.status !== 200) return this.$message.error('获取失败')
             res.data.forEach(item => {
                 item.attr_vals = item.attr_vals.length==0? []: item.attr_vals.split(',')
             })
                this.tableManyList = res.data

         }else if (this.activeIndex === '2'){
            const {data: res} = await this.$http.get(`categories/${this.CreatId}/attributes/`, {params:{sel: 'only'}})
            if (res.meta.status !== 200) return this.$message.error('获取失败')
             
                this.onlyList = res.data
         }
     },
     // 图片预览
     handlePreview(file) {
         this.preview_url = file.response.data.url
          this.prewDialog = true
     },
     // 移除图片操作
     handleRemove(arg) {
         
         const tmp_path = arg.response.data.tmp_path
         const i = this.addForm.pics.findIndex(item => item.pic === tmp_path)
         this.addForm.pics.splice(i, 1)
     },
     // 上传成功
     successHandle(response){
         var picInfo = {
             pic: response.data.tmp_path
         }
         this.addForm.pics.push(picInfo)
     },
     // 提交添加
     add() {
         this.$refs.ruleFormRef.validate(async valid => {
             if (!valid) {
                 return this.$message.error('请完整表单项')
             }
             const form = _.cloneDeep(this.addForm)
             form.goods_cat = form.goods_cat.join(',')
             // 处理动态参数
             console.log(this.onlyList)
             this.tableManyList.forEach(item => {
                 const newInfo = {
                     attr_id: item.attr_id,
                     attr_value: item.attr_vals.join(' ')
                 }
                 this.addForm.attrs.push(newInfo)
             }),
             // 处理静态属性
             this.onlyList.forEach(item => {
                 const newInfo = {
                     attr_id: item.attr_id,
                     attr_value: item.attr_vals
                 }
                 console.log('newInfo')

                 this.addForm.attrs.push(newInfo)
                

             })
              form.attrs = this.addForm.attrs
                 console.log(form.attrs)
                // 发起请求添加商品
                const {data: res} = await this.$http.post('goods', form)
                if (res.meta.status !== 201) return this.$message.error('添加失败')
                this.$message.success('添加成功')
                this.$router.push('/goods')
                console.log(res)
         })
     }
  },
  computed:{
      CreatId() {
          if (this.addForm.goods_cat.length===3){
              return this.addForm.goods_cat[2]
          }
          return null
      }
  }
 
};
</script>
<style  scoped>
.edit-btn{
    margin-top: 30px;
}
</style>